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Vol. 164, Issue 2, February 2014, pp. 58-64

 

Bullet

 

A Compound Detection System Based on Ultrasonic Flow Rate and Concentration
 

Qing-Hui WANG, Fang MU, Li-Feng WEI

School of Information Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China
Tel.: 13940242598, fax: 02489387338

E-mail: wangqh8008@vip.sina.com

 

Received: 11 December 2013 /Accepted: 28 January 2014 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems

 

Abstract: This paper proposes a new detection system for monitoring gas concentration and flow rate. Velocity difference of ultrasonic wave in bi-directional propagation in measured gas is recorded and utilized for computing the online gas concentration and flow rate. Meanwhile, the temperature compensation, return signal processing and error analysis algorithms are applied to improve the accuracy. The experimental results show that, compared with the single sensor measurement of gas flow rate or concentration, the proposed detection system with lower cost and higher accuracy can be applied in the occasion which needs simultaneous monitoring of gas concentration and flow rate.

 

Keywords: Ultrasound, Time difference method, Propagation time, Concentration of oxygen, Gas flow rate, Temperature compensation.

 

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